Your 'energy conversion 1' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
** Your optional message or comment: **
** How far and through what angle did the block displace on a single trial, with rubber band tension equal to the weight of two dominoes? **
1.46, <2
The first number is how far the dominos traveled after being pulled back to the position where the weight of 2 dominos would stretch the rubberband when hanging freely.
The second is an estimate of how many degrees the domino rotated after being released.
** 5 trials, distance in cm then rotation in degrees, with rubber band tension equal to the weight of two dominoes: **
1.46, <2
1.25, <2
1.24, <2
1.10, <2
1.25, <2
The first number in each set is how far the dominos traveled after being pulled back to the position where the weight of 2 dominos would stretch the rubberband when hanging freely.(From 7.04 without the dominos to 7.46 with 2 dominos).
The second is an estimate of how many degrees the domino rotated after being released.(in all cases it seemed to be less than 2 degrees).
** Rubber band lengths resulting in 5 cm, 10 cm and 15 cm slides: **
7.5, 8.2, 8.6
The first distance is the length that when released gave me a distance of 5.05 cm.
The second number is the stretched distance of the rubberband that gave me a distance of 10 cm.
The third distance is the reading that when released the dominos slide to approx 15 cm.
** 5 trials, distance in cm then rotation in degrees, with rubber band tension equal to the weight of four dominoes: **
3.2, 1
2.95, 1
3.24, 1
3.15, 1
3.3, 1
These are the 5 mesurements I got from releasing the dominos from the same position the rubber band was in when it held 4 dominos. That was 7.50 with 7.04 being the length wil no dominos and the starting point.
All the rotaions appeared to be under 2 degrees so I just put 1 for each.
** 5 trials, distance in cm then rotation in degrees, with rubber band tension equal to the weight of six dominoes: **
5.1, 1
5.1, 1
5.0, 1
4.9, 1
5.1, 1
These are the 5 mesurements I got from releasing the dominos from the same position the rubber band was in when it held 6 dominos. That was 7.69 with 7.04 being the length wil no dominos and the starting point.
All the rotaions appeared to be under 2 degrees so I just put 1 for each.
** 5 trials, distance in cm then rotation in degrees, with rubber band tension equal to the weight of eight dominoes: **
6.73, 1
6.4, 1
6.05, 1
5.90, 1
5.88, 1
These are the 5 mesurements I got from releasing the dominos from the same position the rubber band was in when it held 8 dominos. That was 7.83 with 7.04 being the length wil no dominos and the starting point.
All the rotaions appeared to be under 2 degrees so I just put 1 for each.
** 5 trials, distance in cm then rotation in degrees, with rubber band tension equal to the weight of ten dominoes: **
8.80, 1
8.50, 1
8.45, 1
8.90, 1
9.25, 1
These are the 5 mesurements I got from releasing the dominos from the same position the rubber band was in when it held 10 dominos. That was 7.94 with 7.04 being the length wil no dominos and the starting point.
All the rotaions appeared to be under 2 degrees so I just put 1 for each.
** Rubber band length, the number of dominoes supported at this length, the mean and the standard deviation of the sliding distance in cm, and the energy associated with the stretch, for each set of 5 trials: **
0.42, 2, 1.26, 0.1286, 0.494
0.46, 4, 3.168, 0.1337, 0.722
0.65, 6, 5.04, 0.05944, 0.9025
0.79, 8 6.192, 0.03659, 1.0887
0.9, 10, 8.78, 0.3252, 1.2768
The first number is the stretch from the resting point applied by the number of dominos which is the second number.
The third number in each set is the mean of the distance the dominos slid when the rubber band was strectched the distance specified by the first number. Bothe the first and third numbers are in cm.
The forth number is the Standard deviation for the set of lenghs collecte for that data set.
The fith number is the work done on the rubberband in N cm when it is stretched the given distance from its starting point. We found the work for each interval during the last experiment. To get the totals I just added all the previous intervals to the one that I was calculating. The firs for 2 dominos is what we found. When I need the work done for 4 dominos I added the work done over the 0-2 domino interval and the 2-4 domino interval and so on.
The work done or PE of the rubber bads was calculated using a Force vs lengh stretched graph. We would take the average force for an interval and multiply it over the stretch of the rubber bandsover the interbal.
** Slope and vertical intercept of straight-line approximation to sliding distance vs. energy, units of slope and vertical intercept, description of the graph and closeness to line, any indication of curvature: **
9.7, -3.5
The first number is slope (cm/(N cm)given in 1/N the second # is y-intercept in cm.
The data points seem to cluster very closely to a straight line the 8 domino set is a little below the line but within reason.
There doesn't seem to be any curvature.
** Lengths of first and second rubber band for (first-band) tensions supporting 2, 4, 6, 8 and 10 dominoes: **
** Mean sliding distance and std dev for each set of 5 trials, using 2 rubber bands in series: **
** Slope and vertical intercept of straight-line approximation to sliding distance vs. energy, units of slope and vertical intercept, description of the graph and closeness to line, any indication of curvature: **
** 1-band sliding distance and 2-band sliding distance for each tension: **
** Slope and vertical intercept of straight-line approximation to 2-band sliding distance vs. 1-band sliding distance, units of slope and vertical intercept, description of the graph and closeness to line, any indication of curvature: **
** Discussion of two hypotheses: 1. The sliding distance is directly proportional to the amount of energy required to stretch the rubber band. 2. If two rubber bands are used the sliding distance is determined by the total amount of energy required to stretch them. **
** How long did it take you to complete this experiment? **
3.5 Hours
** Optional additional comments and/or questions: **
I have worked on this experiemt for 3 1/2 hours already I do not have the time required to complete all this againe with a second rubber band. At this time. I am sending this just so that I can have the information at a later time. I will try to complete the rest with in a day or 2. I am more worried about learning the information for the upcoming test so I need to complete the class work for now.
You did the required work and it looks very good. The second part, with the two rubber bands, is not required in the present version of the experiment.